With the iOS 6.x jailbreak slated for release on Monday, those planning to jailbreak should take one step to make sure their devices can always be restored to iOS 6.1 after Apple stops signing the firmware. If you have to restore your iPhone in the future, it pays to have SHSH blobs saved so you can always go back to an earlier, jailbreakable version of iOS.
Apple could always close loopholes with iOS 6.1.1 or later, making it more difficult for the evad3rs to successfully jailbreak. Once Apple stops signing an older version of iOS, you must have your SHSH blobs to restore. There are only a few simple steps and a free software package required to protect yourself from losing the iOS 6.x jailbreak. The extra insurance is worth the time it takes to follow these instructions: